Skeletal muscle glycogenolysis

—) >

; cB
Nerve impulse —_Ca2+ Ca?* Ca?*-calmodulin

Sarcoplasmic , ee
reticulum Phosphorylase kinase : Protein kinase A

a
~ Muscle ATP ADP AMP Glycogen Glycogen

j hosphorylase b hosphoryl
Pontrecdon Myosin Adenylate dais ie llc as actos

ATPase kinase

Pi